NIC Cosmetology Written (Theory) ExamHair Care and ServicesMedium
A client with coarse, resistant hair desires a permanent wave that will provide a firm, lasting curl. Which type of permanent wave solution would be most appropriate for this hair type?
- AAlkaline wave
- BAcid-balanced wave
- CLow-pH alkaline wave
- DTrue acid wave
Show answer & explanationAnswer & explanation
Correct answer: A. Alkaline wave
Alkaline waves, also known as cold waves, have a high pH and are effective for coarse, resistant hair, providing a strong, firm curl.
Why the other options are wrong
- B. Acid-balanced waves are generally used for processed or delicate hair, offering a gentle curl.
- C. Low-pH alkaline waves are a milder option than traditional alkaline waves, not typically used for highly resistant hair.
- D. True acid waves have a lower pH and are better suited for delicate or damaged hair, producing softer curls.
Alkaline Permanent Waves
Permanent waves that use ammonium thioglycolate and have a pH between 9.0 and 9.6, ideal for coarse, resistant hair.
- Known as 'cold waves' because they do not require heat.
- Produce strong, firm curls.
- Should not be used on porous or damaged hair.
Memory trick: Alkaline for the strong, acid for the soft, gentle song.